Heerema has manoeuvred the world’s largest semi-submersible crane vessel, Sleipner, through the Karmsund Strait in Norway, in order to lift Equinor’s Snorre A module.

Sleipner was on route to Haugesund, Norway, where the vessel lifted the module directly from the quayside at Aibel’s yard.

At its narrowest, the strait measured 134 m. This left the vessel with just 15 m of clearance each side.

For the project, Heerema collaborated with Norwegian Hydrographic Service and maritime technology specialist Kongsberg, which are both working on Norway’s S102 project that aims to make maritime geographical information available to all users of Norway's coastal and marine areas.

The information shared between these parties enabled Heerema to run three simulations prior to the move, taking into account currents, tidal shifts, and wind.